Mechanical pencil



'Patented June 1, 1926. i l

iJNiTi-:D STATES PATENT-orner.

FRANK C. DELI, OF- CHICAGO, ILLINOIS, ASSIGNOB, BY MESNE .ASSIGNMENTS, T AUTOIOINT COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

MECHANICAL PENCIL. Application led August 30, 1920. Serial Nos 406,980.

This invention relates to certain new and The reference numeral designates the useful improvements in lead pencils of the barrel or body of the pencil, which barrel 55 magazine or mechanical type, commonly or body is by preference cylindrical in form called ever-sharp pencils, and it consists and may be made of any suitable dimensions i in certain peculiaritiesof the construction, and material, but preferably of metal. This novel arrangement, combination and operbarrel is provided near its front or lower ation of the various parts thereof, as will end with an outwardly extended annular 60 be hereinafter more fully set forthy and bead 1l, and near its upper or other end with specifically claimed.v 4 a similar bead 12 which latter bead is em- 10 The principal object of the invention is to ployed for ornamentation only.

rovide a pencil of the above mentioned gen- Closely fitted to the lower or front porl eral character, which shall be simple and tion of the barrel 10, and by preference with- 65 inexpensive in construction, strong, durable in the same is a tube 13 which is provided and highly efficient in operation, with its near its upper end or that end thereof loll5 parts so made, arranged, and operating that cated within the barrel 10 with an outa plurality of leads may be'carried thereby, wardly extended annular bead 14 which cowith one lead in operative position to be arlincides `or engages with the bead 11for the 70 vanced through one end of the body of the purpose of preventing longitudinal movepencil for use, or retracted, when not for use, ment of the barrel l0 and the tube 13 with to prevent the point thereof being broken respect to each other.

or impaired. A further object is to provide As is clearly shown in Fig. 1 of the drawmeans for actuating a plunger for the opering, the tube 13 extends downwardly some 75 ative lead of the pencil by the rotation of a distance below the lower or front end of shell or member to cause said lead to be the barrel 10 and has closely fitted thereon advanced or, fed forwardly. Still another the upper portion of a downwardly or forobject is to utilize a part ofy the plunger wardly shaped tubular tip in the form of a operatingmechanism as aguide orlholder shell 16 which isprovided with a filler 17 B0 for the operative lead. of any suitable material, such as metal, ,A still further object is to so construct the which filler is fixed to the shell 16 within various parts of the device that they may the same and extends from a point near the be eas'il economically assembled. Various lower or front end of said shell upwardly other o )ects and advantages of the inventherein to .any suitable distance. The filler ss tion will be obvious from the following cle- 17 is provided longitudinally and centrally scription and explanation. with an opening 18 which terminates at Aits In the accompanying drawing which u per end in an enlargement or socket 19 serves to illustrate an embodiment .of the for the purpose to be presentlyv explained. invention'd The front or lower end of the shell 16 is ao Fig. 1 is a central longitudinal sectional provided with longitudinally and transview ofva pencil embodying the invention, kversely extended incisions or slits 20 which showing by continuous lines one end thereof will, afford some resiliency to the retracted closed by a cap or plugl carrying eraser, and end of the shell 16 for the purpose of gripby dotted lines about the position the said pingthe operative lead 21 of the pencil just 95 cap and eraser will occupy when ready for above its point. use. Located within the barrel 10 at a suitable Figs. 2 to 5l inclusive are cross-sectional distance above the beadI4 11 thereof and by views taken on lines 2-2, 3-3, 4 -4, 55, preference on the upper end of the tube 13' respectively, looking iii the direction indiis a disk 22 which is provided with a subico cated by the arrows, an stantially .key-hole shaped opening 23 for Fig. 6 isk a greatly enlarged longitudinal the reception of a guide member 24 which sectional view ofthe front end of the pencil. 4is by preference made of a single piece of Like numerals of reference refer to corresheet metal bent approximately back upon s onding parts throughout the different itself to form a longitudinal channel open views Aof the drawings. i at its lower end, as will be -readily understood by reference to Figs. 2 to 5 inclusive said disk at their he upper end of the fitted in the barrel and has to the opening 23 in Ithe disk 22 and for a like purpose.

In addition to the opening 23 the disk 26 is provided in its periphery with a cut-away t portion 27 which is employed for the purpose of permitting leads to be placed in the magazine or space 28 provided bythe disks 22 and 26 and the main body portion of the barrel. Located within the inner or tubular portion of the guide member 24 and eX- tended from near the upper end and through the lower or front end of said guide piece is a spiral or coil member 29 at its lower end into the socket 19 of the is secured to said Located in the member 29 is a plunger 30 which is provided, preferably, mid a laterally arm 31 which extends laterally beof the guide member 24 as will be readily understood by reference to Fig. of the d this arrangewith the opening 18 extended longitudinal y through the filler 17of the rotary shell, and it is further obvious that as the spiral member 29 is located within the tubular or inner portion of the guid 24 the circular the opening 18 so that a lead 2l may b at the rear end of the pencil through a suitable distance, for instance, until its lower end reaches the lower portion of the opening 18in the filler of the shell.

he upper end of the tip makes a close lit with the tube 13 for' the purpose of appearance and for holding the tip to the pencil. It is obvious, however, that since tiearm 31 isx at all times retained within anges 25, a pull upon the tip will cause e arm to slide downwardly within the channel and through the open lower end t ereof, permitting the arm and the spiral to he pencil. circumstances it is manifest also may be manipulated by preference' exwhich extends t the spiral 29 to f through the medium of the projecting 31 to effect a change of the longitudinal posllunger within the spiral, thereby facilitating the insertion of a new lead from either end thereof. y

n the operative lead is thus p whlcl ,the upper end of is manifest that .the proper direcinwardly ofwill be prohave tted in its free end an eraser 34 Aof rubber or like material which may be u sed y simply removing the cylindrical portion 32 of the cap 33 from the upper end of thev barrel 10 and reversing said capand inserting the cylindrical portion 35 thereof in the barrel. y my improved 1s 1s manifest that by removing y preference-midway bvous that the end for end ywhen inserting it in the guide member. his construction no amount of time or care is necessary in thus assembling the parts. I

As shown in the differentV views of the drawings, the flanges 25 of er are extended laterally approach at their free edgesthe innersurface of the barrel. Theseianges not only serve to guide the arm 31 of the plunger in such a way as to prevent wabbling or decient' operation thereof, but also serveto stiifen the guide member as well as to pro-2.!

therefrom and plunger 30 and f lower end of the 76 llv plunger can be turned v Vvvliat I claim as new an` vide a longitudinally within the barre -to prevent the encil leads located within the magazine 28 obstructing the feeding operation of the operative pencil lead by the plunger, which might occur i the flanges 25 were not employed to protect or to prevent the leads in the magazine gettin under the arm 31 of the plunger.

aving thus fully described my invention,

extended partition Letters Patent 1s- 1. A pencil,'compr`ising in combination, a body, means therein providingal non-circular axial opening, a tip having a cylindrical portion adapted to telesco e over the lower end of said body, a spira secured to said tip, said spiral being open at both ends, a plunger- Within said spiral, said plunger having a ating with the non-circular portion of said axial opening, said' tip, spiral and plunger beingremovable from said bodyT by an endwise pull in any position o adjustment o the parts, the plunger being thereafter removable from the open upper end of t e desire to secure by laterally projecting portion cooperend of the spiral to permit a lead to be placed in said open upper end.

2. Ina pencilthe combination o al body having an axial opening that is non-circular in cross section, a tip having a c lindrical extension adapted to telescope over the lower end of said body,a tubular member prosaid member being op being permanently secured to the tip near its lower extremity, a lead advancing ger in said tubular member, said plunger having a portion adapted to cooperate with said spiral track, said plunger being prevented from rotation by cooperation with the non-circular portion of said axial opening, said tip, tubular member and plunger being removable Vfrom the body in any position the arts, body the plunger may open upper end of said tubular a replacement' lead placed in the tubular member an open upper the plunger replaced.

FRANK C. DELL 

